| 摘要 |
A method and system for restricting at least partial usage of a wireless communication device ( 100 ), like a mobile telephone, includes attempting to establish a communication channel ( 105 ) across a data network, such as non-IMS VoIP communication channel over a wide area network ( 103 ) like the Internet. Where the device ( 100 ) has been subsidized by a voice over data protocol service provider ( 121 ), the method permits such communication only when data communication channels having service provider identifiers ( 123 ) corresponding to one or more permitted data access identification codes ( 201 ) are accessible. Where they are not, at least partial usage of the device ( 100 ) will be restricted.
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